Eric -

Stagger your data:

         __A__   __B__   __C__   __D__
01/02/04   12      23
01/02/04                   32     23
02/02/04   32      12
02/02/04                   56     56

To improve the appearance, set the gap width of the series to zero, and
incorporate some blank rows in the data:

         __A__   __B__   __C__   __D__
<blank row>
01/02/04   12      23
01/02/04                   32     23
<blank row>
02/02/04   32      12
02/02/04                   56     56
<blank row>

This doesn't work with a time scale X axis, only with a category axis.
Change this through Chart Options on the Chart menu, the Axes tab.

For more about stacked-clustered charts, see the details at Stephen
Bullen's site:
  http://www.bmsltd.co.uk/Excel/SBXLPage.asp#Charting
and look at the description for FunChart4

or at Bernard Liengme's site:
  http://www.stfx.ca/people/bliengme/ExcelTips/Columns.htm

- Jon
-------
Jon Peltier, Microsoft Excel MVP
Peltier Technical Services
http://PeltierTech.com/Excel/Charts/
_______